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Finding the Fourth Proportional to 560,141.10, 772,991.18 and 318,423.69

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Solution

The fourth proportional to 560,141.10, 772,991.18 and 318,423.69 is: 439,422.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,141.10 : 772,991.18 = 318,423.69 : x
  2. Step 2: Convert to fraction form
    560,141.10/772,991.18 = 318,423.69/x
  3. Step 3: Cross multiply
    560,141.10x = 772,991.18 × 318,423.69
  4. Step 4: Simplify right side
    560,141.10x = 246,138,704,669.11
  5. Step 5: Solve for x
    x = 246,138,704,669.11/560,141.10
  6. Step 6: Final answer
    x = 439,422.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.